All Questions
Tagged with pulse operational-amplifier
25
questions
-1
votes
1
answer
123
views
Pulse generation from a constant current source
I need to generate a biphasic pulse as shown below.
[![enter image description here][1]][1]
The specifications of the pulse is given below.
Amplitude 0~10mA
Pulse width 10~500µs
Constant inter-pulse ...
- 2,593
0
votes
1
answer
119
views
Sawtooth peak detector
I am trying to create a circuit for converting a variable frequency clock signal (with unknown duty cycle) to a pulse wave with an adjustable frequency-independent duty cycle. My approach is to create ...
- 101
0
votes
1
answer
93
views
Analog circuit for obtaining a phase shift of 1-2 s in an arterial pulse wave signal of period 1-2 Hz
I am trying to design an analog circuit using an operational amplifier to introduce a phase lag of the order of 1-2 seconds in an arterial pulse wave signal (photoplethysmogram or PPG for short) that ...
- 1
0
votes
0
answers
59
views
How can I boost the output current of this pulse generator (LF353, supplied with ±15 V) to above 25 mA?
I have a pulse generator design. Everything works fine, but it is required that the output current is above 25 mA. (The 9.69 kΩ is just a variable resistance to modify the output frequency.)
...
- 83
2
votes
3
answers
737
views
Why is my op-amp pulse generator (LF353) delivering way less voltage (±2 V) than the voltage supplies of the amplifier (±15 V)?
I had to design the following circuit as a pulse generator so that if I vary the resistance the frequency will vary as well. It's defined by the frequency expression:
$$f=\frac{1}{2R_4C_1\ln(3)}$$
...
- 83
0
votes
2
answers
215
views
Amplifier circuit pulse width
I've made a circuit:
Here is link to this circuit emulator: amplifier circuit
The first scope is a 10 kHz input generator and the second scope is circuit output. Which element should be changed to ...
- 103
0
votes
2
answers
338
views
I am planning to design comparator based on Opamp but I am not getting the exact pulse output in LTspice [closed]
I am trying to simulate this but I am not getting the exact "RECTANGULR" pulse output. Kindly help me to figure out where I am going wrong.
I am going to use this circuit as pulse generator ...
- 15
1
vote
0
answers
304
views
Noise in pulse shaper with wide bandwith (MPPC signal)
I am using an MPPC with voltage amplification with the circuit shown below. The circuit is a pulse shaper to count photons, it counts with 4 amplifying stages (OPA 2846) and a comparator (LT1719) at ...
0
votes
1
answer
157
views
Two pulse to create one pulse circuit
I have two pulse quick outputting of an Op Amp at a particular voltage. What I am trying to do is have an output pulse to trigger at the first rising edge pulse and fall at the second rising edge ...
- 1
0
votes
3
answers
3k
views
Why does my op-amp circuit output a rectangle wave form instead of sine?
After tons of research on the web I still don't know what the problem is.
I'm trying to simulate a non-inverting voltage amplifier. It is supposed to generate a similar waveform but when I use the ...
- 13
0
votes
1
answer
224
views
How to properly drive parallel analog switches (variable capacitive loads) with opamp(s)?
So as you can see I have 16 SPDT switches on one side of my 16 'RUT paths' and 16 SPDTs on the other side. Each SPDT(ADG1434) has two source pins (SXA and SXB) and a common drain pin (DX), 'X' ...
- 314
3
votes
2
answers
542
views
Programmable gain Transimpedance amplifier for 4-5 decade resistance measurement using Pulse voltage/current
As you can see from my previous question, I am trying to measure resistance within the range of 200k-60 ohms (around 4-5 decades). I will be using a pulse (5us pulse width and 50ns each rise and fall ...
- 314
2
votes
1
answer
268
views
Optimising a single pulse precision peak amplitude detector
So I made this precision peak detector circuit (with reference from EEVblog's video and experimenting with the resistor/capacitor values), with which I want to measure the peak amplitude of a single ...
- 314
0
votes
0
answers
123
views
Low-pass (band-pass) filter for op amp circuit
I have a circuit that amplifies a one-shot inductive trigger pulse of about 1.3Khz (@780 micro sec period) from about 10-200mV to about 3-4V. Between C1 and R3 there is a 0.13uH inductor coil with 11 ...
- 135
0
votes
0
answers
278
views
Amplify and convert negative pulse to positive pulse
I am looking for design recommendation. Attachment is the block diagram of the system. We have a single photon detector (SPD) (https://www.idquantique.com/quantum-sensing/products/id281/) outputting -...
- 103